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Daniel Wilson
Daniel Wilson,
Category: Medium and Heavy Trucks
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Experience:  Owner at DJ Wilson
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I have a 2010 ford f650 with a fuse issue. it is popping the

Customer Question

i have a 2010 ford f650 with a fuse issue. it is popping the fuse for the nitrogen oxide sensors, i replaced the 2 sensors 2 weeks ago and all was ok now seems everytime the truck is shut off and started back up, it pops the fuse for them. vin 3FRNF6FC5BV356983 engine number 73108549.the codes i get are
Aftertreatment 1 outlet NOx Sensor abnormal update rate.Aftertreatment 1 intake NOx sensor abnormal update rateAftertreatment SCR oprtstor inducement data valid but above nornal operator ranfe, most servereengine protection torque derate condidtion exisitAftertreatment 1 diesel oxidation catatysr face plugged, root cause unknown.surely the 2 sensors didnt go bad, i dont have any information on the fuse box wiring outside the cab there on the drivers side. any help will be great.. i can clear everything out with insight and they wont come right back, i guess it takes a bit to pop the fuse.
Submitted: 1 year ago.
Category: Medium and Heavy Trucks
Expert:  Daniel Wilson replied 1 year ago.

Hi my name is***** will be glad to try to help. If the sensors are new check the harness thoroughly for any shorted or damaged wiring or connectors. Since the fuses are blowing it is likely that there is a short to power or ground in the sensor harness. Let me know the results and if we need to dig deeper. If so please post the complete fault code numbers and your engine make and model information.

Customer: replied 1 year ago.
I posted the engine number and VIN on my message above. It's a Cummins ISB6.7. I did check the harness but didn't see anything out of the ordinary.
Expert:  Daniel Wilson replied 1 year ago.

im not a dealer. Cant look things up by your VIN or engine number. Its only good for ordering parts for me. I am an independent and have a repair business.

Expert:  Daniel Wilson replied 1 year ago.

What are the complete code numbers?

Customer: replied 1 year ago.
Cummins insight lists these as the codes.
2771
3232
3712
3714
2637
Expert:  Daniel Wilson replied 1 year ago.

This fault code 3712 is for information only, and indicates that an engine power derate and vehicle speed limit have been implemented in order to make sure that the critical SCR related fault codes that are presently active in the ECM are addressed as quickly as possible

CODE REASON EFFECT

Fault Code: 3712
PID: P105
SPN: 5246
FMI:
LAMP: Red
SRT:

Aftertreatment SCR Operator Inducement - Data Valid But Above Normal Operational Range - Most Severe Level. Critical SCR related fault codes have been active for an extended period of time and require immediate attention.

Immediate engine power derate. Vehicle speed will be limited to 8 km [5 miles] per hour.

Possible causes of fault code 2771 include:

  • The Aftertreatment Outlet NOx Sensor is not receiving power from the battery supply circuit in the OEM harness. This can be caused by an open circuit in the power supply wire, blown NOx sensor fuse, or low voltage supplied by the battery.
  • Open return circuit on the aftertreatment outlet NOx sensor battery return.
  • Open or short circuit on the J1939 data link circuit between the engine control module and aftertreatment outlet NOx sensor.
  • Intermittent communications between the aftertreatment outlet NOx sensor and the primary engine control module on the J1939 data link.
  • A damaged engine control module.

CODE REASON EFFECT

Fault Code: 2771
PID:
SPN: 3226
FMI: 9
LAMP: Amber
SRT:

Aftertreatment Outlet NOx Sensor - Abnormal Update Rate. No communications or an invalid data transfer rate detected on the J1939 data link between the engine control module and the aftertreatment outlet NOx sensor.

Aftertreatment outlet NOx sensor operation will be disabled.

Possible causes of fault code 33232 include:

  • The aftertreatment intake NOx sensor is not receiving power from the battery supply circuit in the OEM harness. This can be caused by an open circuit in the power supply wire, malfunctioned NOx sensor fuse, or low voltage supplied by the battery.
  • Open return circuit on the aftertreatment intake NOx sensor circuit between the battery circuit aftertreatment intake NOx sensor.
  • Open or short circuit on the J1939 data link circuit between the engine ECM and aftertreatment intake NOx sensor.
  • Intermittent communications between the aftertreatment intake NOx sensor and the primary engine ECM on the J1939 data link
  • A malfunctioning engine ECM.

CODE REASON EFFECT

Fault Code: 3232
PID:
SPN: 3216
FMI: 9
LAMP: Amber
SRT:

Aftertreatment Intake NOx Sensor - Abnormal Update Rate. No communication or an invalid data transfer rate has been detected on the J1939 data link between the ECM and the aftertreatment intake NOx sensor.

Aftertreatment intake NOx sensor operation will be disabled

This fault code is for information only, and indicates that an engine power derate has been implemented in order to make sure that the critical fault codes that are presently active in the ECM are addressed as quickly as possible.

CODE REASON EFFECT

Fault Code: 3714
PID: S115
SPN: 1569
FMI: 31
LAMP: Amber
SRT:

Engine Protection Torque Derate - Condition Exists. Critical fault codes related to engine operation are active.

Immediate engine power derate.

Expert:  Daniel Wilson replied 1 year ago.

FAULT CODE
3232

Aftertreatment Intake NOx
Sensor - Abnormal Update Rate

Overview

CODE REASON EFFECT

Fault
Code: 3232
PID:
SPN: 3216
FMI: 9
LAMP: Amber
SRT:

Aftertreatment Intake NOx Sensor - Abnormal Update Rate. No communication or
an invalid data transfer rate has been detected on the J1939 data link between
the ECM and the aftertreatment intake NOx sensor.

Aftertreatment intake NOx sensor operation will be disabled.

Circuit Description

The aftertreatment intake NOx (nitrogen oxides) sensor is a smart device and
receives commands from the engine electronic control module (ECM) via the J1939
data link. The aftertreatment intake NOx sensor performs its own internal
diagnostics and reports malfunctions back to the primary ECM using the J1939
data link. The NOx sensor is permanently attached to the NOx control module.
They are serviced as a single component and can not be replaced
individually. The aftertreatment intake NOx sensor is used to measure the engine
out NOx emissions.

Component Location

The aftertreatment intake NOx sensor is mounted on the engine near the
turbocharger turbine outlet.

Conditions for Running the Diagnostics

This diagnostic runs continuously when the keyswitch is in the ON
position.

Conditions for Setting the Fault Codes

This fault code is triggered when the ECM loses J1939 communications with the
aftertreatment intake NOx sensor.

Action Taken When the Fault Code is Active

  • The ECM illuminates the amber CHECK ENGINE lamp and/or the Malfunction
    Indicator Lamp (MIL) immediately when the diagnostic runs and fails.
  • Engine torque will be reduced if the engine is operated for a limited period
    of time with the fault code active.
  • Engine torque will be severely reduced and vehicle speed will be limited to
    8 km [5 mi] per hour after extended engine operation with the fault code
    active.

Conditions for Clearing the Fault Code

  • To validate the repair, start the engine and let it idle for 1 minute.
  • The fault code status displayed by INSITETM electronic service tool will
    change to INACTIVE immediately after the diagnostic runs and passes.
  • The ECM will turn off the amber CHECK ENGINE lamp after the diagnostic runs
    and passes.
  • For On-Board Diagnostics (OBD) engines, the ECM will turn off the MIL after
    three consecutive trips where the diagnostic runs and passes.
  • The "Reset All Faults" command in INSITETM electronic service tool can be
    used to clear active and inactive faults, as well as extinguish the MIL for OBD
    applications.

Shop Talk

Possible causes of this fault code include:

  • The aftertreatment intake NOx sensor is not receiving power from the
    battery supply circuit in the OEM harness. This can be caused by an open circuit
    in the power supply wire, malfunctioned NOx sensor fuse, or low voltage supplied
    by the battery.
  • Open return circuit on the aftertreatment intake NOx sensor circuit between
    the battery circuit aftertreatment intake NOx sensor.
  • Open or short circuit on the J1939 data link circuit between the engine ECM
    and aftertreatment intake NOx sensor.
  • Intermittent communications between the aftertreatment intake NOx sensor and
    the primary engine ECM on the J1939 data link
  • A malfunctioning engine ECM.

Reference the appropriate OEM wiring diagram when troubleshooting circuits
that utilize wiring supplied by the OEM.

For intermittent power supply and datalink communication issues with
Aftertreatment Components, it is highly recommended that the OEM Power
Distribution Center fuses and relays be thoroughly checked for loose, missing or
intermittent connections.

Expert:  Daniel Wilson replied 1 year ago.

Troubleshooting

STEP 1: Check the fault codes.

STEP 1A: Check for active fault codes.

Condition:

  • Turn keyswitch ON.

 

  • Connect INSITETM electronic service tool.

Action Specification/Repair Next Step

Check for active fault codes.

  • Use INSITETM electronic service tool to read

the fault codes.

Fault Code 3232 active?

YES

1B

Fault Code 3232 active?

NO

Refer to

Procedure

019-362 in

Section 19.

File: 145-t05-3232 Page 3 of 13

STEP 1B: Check for active fault codes.

Condition:

  • Turn keyswitch ON.

 

  • Connect INSITETM electronic service tool.

Action Specification/Repair Next Step

Check for active fault codes

  • Use INSITETM electronic service tool to read

the fault codes.

Fault Codes 2636, 2771, and 3597 all

active?

YES

4A

Fault Codes 2636, 2771, and 3597 all

active?

NO

2A

STEP 2: Check the aftertreatment intake NOx sensor circuit.

STEP 2A: Inspect aftertreatment intake NOx sensor and connector pins.

Condition:

  • Turn keyswitch OFF.

 

  • Disconnect the aftertreatment intake NOx sensor from the engine harness.

Action Specification/Repair Next Step

Inspect the engine harness and aftertreatment

intake NOx sensor connector pins for the

following:

  • Loose connector

 

  • Corroded pins

 

  • Bent or broken pins

 

  • Pushed back or expanded pins

 

  • Moisture in or on the connector

 

  • Missing or damaged connector seals

 

  • Dirt or debris in or on the connector pins

 

  • Connector shell broken

 

  • Wire insulation damaged

 

  • Damaged connector locking tab.

Use the following procedure for general

inspection techniques. Refer to Procedure

019-361 in Section 19.

Dirty or damaged pins?

YES

Repair:

A damaged connector has been detected in

the sensor or harness connector.

Clean the connector and pins.

Repair the damaged harness, connector, or

pins, if possible. Refer to Procedure 019-071

in Section 19.

5A

Dirty or damaged pins?

NO

2B

File: 145-t05-3232 Page 4 of 13

STEP 2B: Check the voltage to the aftertreatment intake NOx sensor.

Condition:

  • Turn keyswitch OFF.

 

  • Disconnect the aftertreatment intake NOx sensor from the engine harness.

 

  • Turn keyswitch ON.

Action Specification/Repair Next Step

Check the power supply and return circuit to the

aftertreatment intake NOx sensor.

  • Measure the voltage between the

aftertreatment intake NOx sensor battery

voltage supply circuit and the aftertreatment

intake NOx sensor battery voltage return

circuit at the NOx sensor wiring harness

connector.

Check the voltage at key ON while cranking the

engine, and with the engine at idle.

Use the following procedure for general

inspection techniques. Refer to Procedure

019-361 in Section 19.

Voltage within 1-VDC of battery voltage?

YES

2C

Voltage within 1-VDC of battery voltage?

NO

3A

STEP 2C: Check for correct adjustable parameter settings.

Condition:

  • Turn keyswitch ON.

 

  • Connect INSITETM electronic service tool.

Action Specification/Repair Next Step

Check for correct adjustable parameter settings.

  • Make sure the Electrical System Voltage

setting in INSITETM electronic service tool is

correct for the engine configuration.

To check the voltage configuration of the engine,

disconnect the orginal equipment manufacturer

(OEM) connector from the ECM and measure

the voltage from the ECM battery SUPPLY (+)

pin of the OEM harness ECM connector to block

ground.

Electrical System Voltage parameter correct

for the engine configuration?

YES

2D

Electrical System Voltage parameter correct

for the engine configuration?

NO

Repair:

Use INSITETM electronic service tool to

configure the electrical system voltage to

match the engine configuration.

5A.

File: 145-t05-3232 Page 5 of 13

STEP 2D: Check for correct aftertreatment intake NOx sensor.

Condition:

  • Turn keyswitch OFF.

 

  • Remove aftertreatment Intake NOx sensor.

Action Specification/Repair Next Step

Verify aftertreatment intake NOx sensor is the

correct sensor for the engine configuration.

The aftertreatment intake NOx sensor is

available in 12 volt or 24 volt versions.

Aftertreatment intake NOx sensor is the

correct sensor for the engine configuration?

YES

4A

Aftertreatment intake NOx sensor is the

correct sensor for the engine configuration?

NO

Repair:

Replace the aftertreatment intake NOx

sensor. Refer to Procedure 019-463 in the

Associated Procedures Table.

5A

STEP 3: Check the OEM harness.

STEP 3A: Check the battery and the power connector.

Condition:

  • Turn keyswitch OFF.

Action Specification/Repair Next Step

Check the battery connections.

Check the battery terminal connections.

Connections tight and corrosion-free?

YES

3B

Connections tight and corrosion-free?

NO

Repair:

Tighten the connections.

Tighten the loose connections, and clean the

terminals. Refer to the OEM service manual.

5A

File: 145-t05-3232 Page 6 of 13

STEP 3B: Check for an open circuit in the aftertreatment intake NOx sensor battery voltage supply.

Condition:

  • Turn keyswitch OFF.

 

  • Disconnect the aftertreatment intake NOx sensor from the engine harness.

 

  • Turn keyswitch ON.

Action Specification/Repair Next Step

Check for an open circuit

  • Measure the voltage from the aftertreatment

intake NOx sensor battery voltage SUPPLY

pin of the engine harness to engine block

ground.

Check the voltage at key ON, while cranking the

engine, and with the engine at idle.

Refer to the wiring diagram for connector pin

identification.

Use the following procedure for general

inspection techniques. Refer to Procedure

019-361 in Section 19.

Voltage within 1-VDC of battery voltage?

YES

Repair:

An open circuit has been detected in the

aftertreatment intake NOx sensor battery

voltage return circuit.

Check for blown or missing fuses. Check for

damaged or missing relays. Troubleshoot the

engine harness, OEM harness, and all

interconnects. Repair or replace the

damaged component(s) as necessary.

5A

Voltage within 1-VDC of battery voltage?

NO

Repair:

An open circuit has been detected in the

aftertreatment intake NOx sensor battery

voltage supply circuit.

Check for blown or missing fuses.

Troubleshoot the engine harness, OEM

harness, and all interconnects. Repair or

replace the damaged component(s) as

necessary.

5A

File: 145-t05-3232 Page 7 of 13

STEP 4: Check the J1939 data link.

STEP 4A: Inspect engine control module (ECM) and engine harness connector pins.

Condition:

  • Turn keyswitch OFF.

 

  • Disconnect the engine harness connector 1 from the ECM connector.

Action Specification/Repair Next Step

Inspect the engine harness and ECM connector

pins for the following:

  • Loose connector

 

  • Corroded pins

 

  • Bent or broken pins

 

  • Pushed back or expanded pins

 

  • Moisture in or on the connector

 

  • Missing or damaged connector seals

 

  • Dirt or debris in or on the connector pins

 

  • Connector shell broken

 

  • Wire insulation damage

 

  • Damaged connector locking tab.

Use the following procedure for general

inspection techniques.Refer to Procedure

019-361 in Section 19.

Dirty or damaged pins?

YES

Repair:

A damaged connection has been detected in

the ECM connector or the engine harness

connector.

Clean the connector and pins.

Repair the damaged harness, connector, or

pins, if possible. Refer to Procedure 019-071

in Section 19.

5A

Dirty or damaged pins?

NO

4B

STEP 4B: Check for an open circuit in the J1939 data link harness.

Condition:

  • Turn keyswitch OFF.

 

  • Disconnect the aftertreatment intake NOx sensor from the engine harness.

 

  • Disconnect the engine harness connector 1 from the ECM connector.

Action Specification/Repair Next Step

Check for an open circuit in the J1939 data link

harness.

  • Measure the resistance between the SAE

J1939 data link (+) wire at the aftertreatment

intake NOx sensor engine harness connector

and the SAE J1939 data link (+) wire at the

ECM engine harness connector 1.

  • Measure the resistance between the SAE

J1939 data link (-) wire at the aftertreatment

intake NOx sensor engine harness connector

and the SAE J1939 data link (-) wire at the

ECM engine harness connector 1.

Refer to the circuit diagram or the wiring diagram

for connector pin identification.

Use the following procedure for general

resistance measurement techniques.Refer to

Procedure 019-360 in Section 19.

Less than 10 ohms?

YES

4C

Less than 10 ohms?

NO

Repair:

An open or short has been detected on the

J1939 data link.

Repair or replace the harness. Refer to

Procedure 019-043 in the Associated

Procedures Table.

5A

©

STEP 4C: Check for a short circuit in the J1939 data link harness.

Condition:

  • Turn the keyswitch OFF and wait at least 1 minute before proceeding to allow sufficient time for the

aftertreatment DEF controller to completely power down.

  • Disconnect the aftertreatment intake NOx sensor from the engine harness.

 

  • Disconnect the aftertreatment outlet NOx sensor from the OEM harness.

 

  • Disconnect the variable geometry turbocharger (VGT) actuator from the engine harness.

 

  • Disconnect the aftertreatment diesel exhaust fluid (DEF) controller 53-pin connector.

 

  • Disconnect the engine harness connector 1 from the ECM connector.

Action Specification/Repair Next Step

Check for a short circuit in the J1939 data link

harness.

  • Measure the resistance between the SAE

J1939 data link (+) wire at the ECM engine

harness connector 1 and all other pins in the

connector.

  • Measure the resistance between the SAE

J1939 data link (-) wire at the ECM engine

harness connector 1 and all other pins in the

connector.

Disregard any resistance between 110 and 130

ohms between the SAE J1939 data link (+) and

the SAE J1939 data link (-) pins

Refer to the circuit diagram or the wiring diagram

for connector pin identification.

Use the following procedure for general

resistance measurement techniques.Refer to

Procedure 019-360 in Section 19.

Greater than 100k ohms?

YES

4D

Greater than 100k ohms?

NO

Repair:

A short circuit has been detected in the

J1939 data link harness. Troubleshoot the

engine harness, OEM harness, and all

interconnects.

Repair or replace the malfunctioning

component.

5A

STEP 4D: Check for a short circuit to ground in the J1939 data link harness.

Condition:

  • Turn the keyswitch OFF and wait at least 1 minute before proceeding to allow sufficient time for the

aftertreatment DEF controller to completely power down.

  • Disconnect the aftertreatment intake NOx sensor from the engine harness.

 

  • Disconnect the aftertreatment outlet NOx sensor from the OEM harness.

 

  • Disconnect the VGT actuator from the engine harness.

 

  • Disconnect the aftertreatment DEF controller 53-pin connector.

 

  • Disconnect the engine harness connector 1 from the ECM connector.

Action Specification/Repair Next Step

Check for a short circuit to ground in the J1939

data link harness.

  • Measure the resistance between the SAE

J1939 data link (+) wire at the ECM engine

harness connector 1 and ground.

  • Measure the resistance between the SAE

J1939 data link (-) wire at the ECM engine

harness connector 1 and ground.

Refer to the circuit diagram or the wiring diagram

for connector pin identification.

Use the following procedure for general

resistance measurement techniques.Refer to

Procedure 019-360 in Section 19.

Greater than 100k ohms?

YES

4E

Greater than 100k ohms?

NO

Repair:

A short circuit to ground has been detected

in the J1939 data link harness. Troubleshoot

the engine harness, OEM harness, and all

interconnects.

Repair or replace the malfunctioning

component.

5A

File: 145-t05-3232 Page 9 of 13

STEP 4E: Check the J1939 terminating resistance.

Condition:

  • Turn keyswitch OFF.

 

  • Disconnect the aftertreatment intake NOx sensor from the OEM harness.

 

  • Connect all other components, including the diesel exhaust controller, ECM, and VGT.

Action Specification/Repair Next Step

Measure the terminating resistance of the SAE

J1939 data link.

  • Measure the resistance between the SAE

1939 data link (+) wire and the SAE J1939

data link (-) wire at the aftertreatment intake

NOx sensor OEM harness connector.

50 to 70 ohms?

YES

4H

50 to 70 ohms?

NO

4F

STEP 4F: Check the J1939 terminating resistance.

Condition:

  • Turn keyswitch OFF.

 

  • Disconnect the 14-pin OEM connector from the engine harness.

Action Specification/Repair Next Step

Measure the terminating resistance of the engine

harness.

  • Measure the resistance between the SAE

J1939 data link (+) wire and the SAE J1939

data link (-) wire at the 14-pin connector of the

engine harness.

110 to 130 ohms?

YES

Repair:

Incorrect terminating resistance has been

detected in the OEM harness.

Repair or replace the terminating resistor in

the OEM harness. Refer to the OEM service

manual.

5A

110 to 130 ohms?

NO

4G

File: 145-t05-3232 Page 10 of 13

STEP 4G: Check the J1939 terminating resistance.

Condition:

  • Turn keyswitch OFF.

 

  • Disconnect the VGT actuator from the engine harness.

Action Specification/Repair Next Step

Measure the terminating resistance of the VGT

actuator

  • Measure the resistance between the VGT

actuator J1939 data link (+) wire and the VGT

actuator J1939 data link (-) wire at the VGT

actuator connector.

110 to 130 ohms?

YES

Repair:

Incorrect terminating resistance has been

detected in the engine harness.

Remove the additional terminating resistance

or replace the engine harness. Refer to

Procedure 019-043 in the Associated

Procedures Table.

5A

110 to 130 ohms?

NO

Repair:

Incorrect terminating resistance has been

detected in VGT actuator.

Replace the VGT actuator. Refer to

Procedure 010-134 in the Associated

Procedures Table.

5A

STEP 4H: Check the fault codes.

Condition:

  • Turn keyswitch OFF.

 

  • Connect the engine harness to the ECM.

 

  • Connect the aftertreatment intake NOx sensor to the engine harness.

 

  • Turn keyswitch ON.

 

  • Connect INSITETM electronic service tool.

Action Specification/Repair Next Step

Check for the appropriate circuit response after

30 seconds.

  • Use INSITETM electronic service tool to read

the fault codes.

Fault Code 3232 active?

YES

Repair:

Use NOx sensor service, Part Number

(###) ###-#### ***** to test the aftertreatment

intake NOx sensor. Refer to Procedure

019-463 in the Associated Procedures Table.

4I

Fault Code 3232 active?

NO

Repair:

None. The removal and installation of the

connector corrected the fault.

5A

File: 145-t05-3232 Page 11 of 13

STEP 4I: Check the fault codes.

Condition:

  • Turn keyswitch OFF.

 

  • Connect the engine harness to the ECM.

 

  • Connect the aftertreatment intake NOx sensor to the engine harness.

 

  • Turn keyswitch ON.

 

  • Connect INSITETM electronic service tool.

Action Specification/Repair Next Step

Check for the appropriate circuit response after

30 seconds.

  • Use INSITETM electronic service tool to read

the fault codes.

Fault Code 3232 active?

YES

Repair:

Troubleshoot the engine harness, OEM

harness, and all interconnects.

Repair or replace the malfunctioning

component.

5A

Fault Code 3232 active?

NO

Repair:

None. The removal and installation of the

connector corrected the fault.

5A

STEP 5: Check ECM calibration and clear fault codes.

STEP 5A: Check if an ECM calibration update is available.

Condition:

  • Connect all components.

 

  • Connect INSITETM electronic service tool.

Action Specification/Repair Next Step

Compare the ECM code and revision number in

the ECM to the calibration revisions listed in the

ECM Calibration Revision History for applicable

changes related to this fault code.

  • Use INSITETM electronic service tool to find

the present ECM code and revision number in

the ECM. The ECM code and revision number

are found in the Calibration Information

section of System ID and Dataplate in

Features and Parameters.

If a calibration update for this fault code is

available, does the ECM contain that revision

or higher?

YES

5B

If a calibration update for this fault code is

available, does the ECM contain that revision

or higher?

NO

Repair:

If necessary, calibrate the ECM. Refer to

Procedure 019-032 in Section 19.

5B

File: 145-t05-3232 Page 12 of 13

STEP 5B: Disable the fault code.

Condition:

  • Connect all components.

 

  • Connect INSITETM electronic service tool.

Action Specification/Repair Next Step

Disable and clear the fault code.

  • Operate the engine within the "Conditions for

Clearing the Fault Code" found in the

Overview section of this troubleshooting

procedure.

Fault code inactive?

YES

Repair

complete

Fault code inactive?

NO

Repair:

Return to the troubleshooting steps or

contact a Cummins® Authorized Repair

Location if all steps have been completed and problem is not resolved

Expert:  Daniel Wilson replied 1 year ago.

CODE REASON EFFECT

Fault Code: 2637
PID: S380
SPN: 5018
FMI: 11
LAMP: None
SRT:

Aftertreatment Diesel Oxidation Catalyst Face Plugged - Root Cause Not Known. The front face of the aftertreatment diesel oxidation catalyst has been detected to be plugged with soot.

Active aftertreatment diesel particulate filter regeneration will be disabled.

Customer: replied 1 year ago.
Do you have a wiring diagram or pin out of the ecm and nox sensor harnesses
Expert:  Daniel Wilson replied 1 year ago.

Click on this link and see PDF page 89 on.

Troubleshooting

Customer: replied 1 year ago.
I have a question. It says there are 2 versions of those NOx sensors a 12v and 24v. If they gave me the wrong sensors say 1 is 12 the other is 24 or both is 24v would that cause the fuse to blow?
Expert:  Daniel Wilson replied 1 year ago.

It would be possible if you put a 12V one in a 24V system as it would short but I dont think so on the other way around.

Customer: replied 1 year ago.
Alright. Finally got the wrecker in the shop. The fuse pops when turning the key on engine off. Once you start the engine and replace the fuse it's ok. Thinking it maybe switch related cause we did have the Column apart fixing the shifter tube.
Expert:  Daniel Wilson replied 1 year ago.

Thanks for the update. Look for any chafed or damaged/rubbed through wiring and test the ignition switch power in and out in all positions for a potential faulty switch.

Customer: replied 1 year ago.
Well after testing everything it looked ok. Turned it off and on with no issues. Then drove it around the block and it blew the fuse. I'm going to replace the sensors from another truck we have in the shop. Same truck in every way just a crew cab f650. I'll let you know what happens. When the fuse blows it's real slow. It burns just enough to pop it. It's not like a POP where a good portion is missing.
Expert:  Daniel Wilson replied 1 year ago.

Thanks for the update. Having another truck will help greatly in troubleshooting. Keep me posted

Customer: replied 1 year ago.
Well I can't find the short. One minute it's popping the fuse as soon as the key is on. Next it won't pop until you move the truck. So I'm sending it to ford. Freeze frame data shows some weird stuff. I think the ecm is screwed up.